Stefan Kokrhoun

Title: The Innovations of Stefan Kokrhoun

Introduction

Stefan Kokrhoun, an accomplished inventor based in Grobenzell, Germany, has made significant contributions to the field of value document verification. With a total of four patents to his name, Kokrhoun's work focuses on innovative methods and devices designed to enhance the security and reliability of currency and other valuable documents.

Latest Patents

Kokrhoun's latest patents showcase his expertise in document verification technology. One notable invention is a device and method for checking value documents for marking ink. This apparatus comprises at least one first sensor that detects electromagnetic radiation reflected and/or transmitted by the value document, converting the radiation into corresponding first sensor signals. Additionally, a second sensor detects sound waves reflected and/or transmitted by the document, converting those waves into second sensor signals. An evaluation device then processes these signals to determine area values that characterize different sections of the value document, ultimately inferring possible identification markings made with marking ink.

Another significant patent involves a method and device for examining sheet-shaped or card-shaped valuable documents with security features, including one or more cavities. This patent details a procedure for locally assessing transmission values of ultrasound within a specified frequency range to check the integrity of the cavities. If a certain number of these transmission values exceed a predetermined threshold, the document can be deemed authentic.

Career Highlights

Stefan Kokrhoun has built a distinguished career, working with prominent companies in the currency technology sector. Notably, he has been associated with Giesecke & Devrient GmbH and Giesecke+Devrient Currency Technology GmbH, where he applied his innovative ideas to develop advanced security solutions.

Collaborations

Throughout his career, Kokrhoun has collaborated with talented individuals such as Jan Domke and Klaus Thierauf. These partnerships have fostered the exchange of ideas and propelled the development of pioneering technologies in document security.

Conclusion

With his innovative spirit and dedication to enhancing document verification systems, Stefan Kokrhoun continues to impact the field significantly. His patents and collaborations reflect a commitment to advancing technologies that ensure the integrity of valuable documents, making him a notable figure in contemporary invention.